256623203221672 has 48 divisors (see below), whose sum is σ = 580372618332960. Its totient is φ = 104192879495328.

The previous prime is 256623203221643. The next prime is 256623203221673. The reversal of 256623203221672 is 276122302326652.

It is not an unprimeable number, because it can be changed into a prime (256623203221673) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6347011918 + ... + 6347052349.

It is an arithmetic number, because the mean of its divisors is an integer number (12091096215270).

Almost surely, 2^{256623203221672} is an apocalyptic number.

It is an amenable number.

256623203221672 is an abundant number, since it is smaller than the sum of its proper divisors (323749415111288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256623203221672 is a wasteful number, since it uses less digits than its factorization.

256623203221672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12694064318 (or 12694064295 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 49.

The spelling of 256623203221672 in words is "two hundred fifty-six trillion, six hundred twenty-three billion, two hundred three million, two hundred twenty-one thousand, six hundred seventy-two".